28060641656 has 8 divisors (see below), whose sum is σ = 52613703120. Its totient is φ = 14030320824.

The previous prime is 28060641647. The next prime is 28060641667. The reversal of 28060641656 is 65614606082.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×28060641656² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1753790096 + ... + 1753790111.

It is an arithmetic number, because the mean of its divisors is an integer number (6576712890).

Almost surely, 2^28060641656 is an apocalyptic number.

It is an amenable number.

28060641656 is a deficient number, since it is larger than the sum of its proper divisors (24553061464).

28060641656 is a wasteful number, since it uses less digits than its factorization.

28060641656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3507580213 (or 3507580209 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 28060641656 in words is "twenty-eight billion, sixty million, six hundred forty-one thousand, six hundred fifty-six".